<?php
session_start();
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>会员管理系统</title>
    <style>
        .main {
            width: 80%;
            margin: 0 auto;
            text-align: center;
            /* background: green; */
        }
    </style>
</head>
<body>
<div class="main">
    <?php include_once 'nav.php'; ?>
</div>
</body>
</html>